Powerful knowledgeFacts, information, and skills acquired through experience or education; the theoretical or practical understanding of a subject. refers to what the knowledge can do or what intellectual power it gives to those who have access to it.
his knowledge is specialised knowledgeSpecialised knowledge includes a range of factual, theoretical and practical knowledge, as well as competencies and skills in a particular discipline or profession. Students use their... that gives students the ability to think about and do things, that otherwise they couldn't. Young calls this powerful knowledge, not because it exerts 'power over' students, but because it gives 'power to' students.